It is, and always has been, common ground that each of the respondents executed a written loan agreement on 30 June 1989. The respondents alleged that the 'operative agreement' was not contained in that writing. It was said that the relevant agreement was reached earlier and was wholly oral. Yet it was not said that the written agreement should be rectified. It was not said that a defence of non est factum was available. It was not said that the written agreement was executed by mistake, or that its execution was procured by misrepresentation as to its contents or effect. (The misrepresentation alleged was as to what had been said in the conversations, not what the document was or provided.)
The respondents each having executed a loan agreement, each is bound by it. Having executed the document, and not having been induced to do so by fraud, mistake, or misrepresentation, the respondents cannot now be heard to say that they are not bound by the agreement recorded in it (22). The parol evidence rule (23), the limited operation of the defence of non est factum (24) and the development of the equitable remedy of rectification (25), all proceed from the premise that a party executing a written agreement is bound by it. Yet fundamental to the respondents' case that the operative agreements between the parties were wholly oral, and reached earlier than the execution of the written agreements, was the proposition that the written agreements subsequently executed not only may be ignored, they must be. That is not so. Having executed the agreement, each respondent is bound by it unless able to rely on a defence of non est factum, or able to have it rectified. The respondents attempted neither.
There are reasons why the law adopts this position. First, it accords with the 'general test of objectivity [that] is of pervasive influence in the law of contract' (26) The legal rights and obligations of the parties turn upon what their words and conduct would be reasonably understood to convey, not upon actual beliefs or intentions (27).
Secondly, in the nature of things, oral agreements will sometimes be disputable. Resolving such disputation is commonly difficult, time-consuming, expensive and problematic. Where parties enter into a written agreement, the Court will generally hold them to the obligations which they have assumed by that agreement. At least, it will do so unless relief is afforded by the operation of statute or some other legal or equitable principle applicable to the case. Different questions may arise where the execution of the written agreement is contested; but that is not the case here. In a time of growing international trade with parties in legal systems having the same or even stronger deference to the obligations of written agreements (and frequently communicating in different languages and from the standpoint of different cultures) this is not a time to ignore the rules of the common law upholding obligations undertaken in written agreements. It is a time to maintain those rules. They are not unbending. They allow for exceptions. But the exceptions must be proved according to established categories. The obligations of written agreements between parties cannot simply be ignored or brushed aside.
The conclusion that the respondents are bound by the written loan agreements may leave open the possibility that an earlier consensus reached by the parties was in each case a collateral agreement (made in consideration of the parties later executing the written agreement (28)), but that has never been the respondents' case. In another case it may leave open the possibility that the contract is partly oral and partly in writing (29). But that cannot be so here. The oral limited recourse terms alleged by the respondents contradict the terms of the written loan agreement. If there was an earlier, oral, consensus, it was discharged and the parties' agreement recorded in the writing they executed (30). It is the written loan agreement which governed the relationship between Rural Finance and each respondent.